IS24C128
131,072-bit 2-WIRE SERIAL
CMOS EEPROM
ISSI
DESCRIPTION
®
PRELIMINARY INFORMATION
MARCH 2003
FEATURES
• Organization:
– 16K-bit x 8-bit
• 64-Byte Page Write Buffer
• Two-Wire Serial Interface
– Bi-directional data transfer protocol
• Low Power CMOS Technology
– Active Current less than 2 mA (5V)
– Standby Current less than 5 µA (5V)
– Standby Current less than 2 µA (2.5V)
• Low Voltage Operation
– IS24C128-2: Vcc = 1.8V to 5.5V
– IS24C128-3: Vcc = 2.5V to 5.5V
• 400 KHz (I
2
C Protocol) Compatibility
• Hardware Data Protection
– Write Protect pin
• Sequential Read Feature
• Filtered Inputs for Noise Suppression
• Self time Write cycle with auto clear
– 5 ms @ 2.5V
• High Reliability
– Endurance: 100,000 Cycles
– Data Retention: 40 Years
• Commercial and Industrial temperature ranges
• 8-pin PDIP, 8-pin SOIC, and 14-pin TSSOP
The IS24C128 is an electrically erasable PROM
device that uses the standard 2-wire interface for
communications. The IS24C128 contains a memory
array of 128K-bits (16,384 x 8), and is further
subdivided into 256 pages of 64 bytes each for page-
write mode. This EEPROM is offered in wide operating
voltages of
1.8V to 5.5V
(IS24C128-2) and 2.5V to 5.5V
(IS24C128-3) to be compatible with most application
voltages. ISSI designed the IS24C128 to be a low-cost
and low-power 2-wire EEPROM solution. The devices
are packaged in 8-pin PDIP, 8-pin SOIC, and 14-pin
TSSOP.
The IS24C128 maintains compatibility with the popular
2-wire bus protocol, so it is easy to design into
applications implementing this bus type. The simple
bus consists of the Serial Clock wire (SCL) and the
Serial Data wire (SDA). Using the bus, a Master
device such as a microcontroller is usually connected
to one or more Slave devices such as the IS24C128.
The bit stream over the SDA line includes a series of
bytes, which identifies a particular Slave device, an
instruction, an address within that Slave device, and a
series of data, if appropriate. The IS24C128 has a
Write Protect pin (WP) to allow blocking of any write
instruction transmitted over the bus.
Copyright © 2002 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time without notice. ISSI
assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device
specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
PRELIMINARY INFORMATION Rev. 00B
03/11/03
1
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
